Specifications

2.14 CODE #80 — DUPLEX AND COPIER BOARD COMMUNICATION
ERROR
- Definition -
The copier main board does not receive any signal from the duplex main
board.
- Possible Causes -
• Interface board defective
• Copier main board defective
• Duplex main board defective
• Optional dc power supply unit defective
• 2nd paper size switches shorted
- Action -
Turn the main switch off and on
Is the connector (CN205) on the interface board connected properly?
Yes No
Connect the connector (CN205) properly.
Is the connector (CN710) on the rear frame installed properly?
Yes No
Install the connector (CN710) on the frame properly.
Are the fuses (FU100 or FU101) on the optional dc power supply unit bro-
ken?
No Yes
Check the cause of the fuse damage and repair it, then replace the
defective fuse.
Check the voltage at CN101-2 on the optional dc power supply unit.
5V 0V
Replace the optional dc power suppy unit.
1 December 1990
6-46